Air ventilation grill



FIG. 1 is a front perspective view of the air ventilation grill;

FIG. 2 is a front elevation view of the air ventilation grill;

FIG. 3 is a top side plan view of the air ventilation grill;

FIG. 4 is a bottom side plan view of the air ventilation grill;

FIG. 5 is a right side elevation view of the air ventilation grill;

FIG. 6 is a left side elevation view of the air ventilation grill;

FIG. 7 is a cross-sectional view along 7—7 of the air ventilation grill of FIG. 2; and,

FIG. 8 is a cross-sectional view along 8—8 of the air ventilation grill of FIG. 2. 

The ornamental design for a air ventilation grill, as shown. 